Abstract
DTI is distinguished from DWI by its sensitivity to anisotropy or directionally dependent diffusion. Therefore, DTI allows the study of microstructural characteristics of the measured tissue. This fairly new imaging technique is mainly used to study macroscopic axonal organization in nervous system tissues. It has been shown that anisotropy in the white matter of the brain is, in part, determined by axonal density as well as myelin status. Changes in diffusion in pathological processes, such as tumors, can have several causes, such as the loss of tissue organization or changes in the extracellular space. Furthermore, brain tumors induce the disruption or displacement of white matter structures, the widening of fiber bundles due to tumor infiltration or edema. The principal application of DTI in the neuroradiology of brain tumors is DTI tractography for intraoperative guidance in tumor resection, as covered in the previous chapter. This chapter reviews the potential role of DTI in the (differential) diagnosis and follow-up of brain tumors, and special challenges associated with this application in clinical practice.
Keywords
Characterizing brain tumors Tumor grade Surgical planning Monitoring treatment effectsReferences
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